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Kameo H, Miyazaki T, Shimoyama Y, Asada A, Izumi D, Matsuzaka H, Bourissou D. Trigonal-Bipyramidal Pt(0) and Pd(0) Anions. Inorg Chem 2024. [PMID: 38976600 DOI: 10.1021/acs.inorgchem.4c01884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
Anionic Pt(0) and Pd(0) complexes with unprecedented trigonal-bipyramidal geometry have been prepared and thoroughly characterized by experimental and computational means. Coordination of a σ-acceptor borane moiety supported by three phosphine buttresses enhances the electrophilicity of M(0) and triggers the binding of soft anions (X = Br, I, CN).
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Affiliation(s)
- Hajime Kameo
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Osaka 558-8585, Japan
| | - Tokoro Miyazaki
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Osaka 558-8585, Japan
| | - Yoshihiro Shimoyama
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba, Ibaraki 305-8565 Japan
| | - Ayaka Asada
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Osaka 558-8585, Japan
| | - Daisuke Izumi
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Osaka 558-8585, Japan
| | - Hiroyuki Matsuzaka
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Osaka 558-8585, Japan
| | - Didier Bourissou
- Laboratoire Hétérochimie Fondamentale et Appliquée, UMR 5069, CNRS, Université Toulouse III Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 09, France
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2
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Sadeghian M, Gómez de Segura D, Golbon Haghighi M, Safari N, Lalinde E, Moreno MT. Ladder-like heteropolynuclear assemblies via cyanido bridges and platinum(II)-thallium(I) bonds: structural and photophysical properties. Dalton Trans 2024; 53:7788-7800. [PMID: 38623699 DOI: 10.1039/d4dt00674g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
We describe the mononuclear anionic cyanido-pentafluorophenyl complexes, (NBu4)[Pt(C^N)(C6F5)(CN)] [C^N = 7,8-benzoquinolate (bzq) 1, 2-(2,4-difluorophenyl)pyridinate (dfppy) 2] and the heteropolynuclear derivatives [{Pt(C^N)(C6F5)(CN)}Tl] (C^N = bzq 3, dfppy 4). These complexes were synthesized via a two-step modular synthesis by reaction of the corresponding potassium salts K[Pt(C^N)(C6F5)(CN)], prepared in situ from [Pt(C^N)(C6F5)(DMSO)] and KCN in acetone/H2O, with TlPF6. The structures of {[Pt(bzq)(C6F5)(CN)Tl]·THF}n (3·THF)n and [{Pt(dfppy)(C6F5)(CN)}Tl]4·dioxane [4]4·dioxane, determined by X-ray crystallography, confirm the presence of Pt(II)-Tl(I) bonds [2.9795(6)-3.0736(3) Å], but in the dfppy complex, the incorporation of dioxane, causes a significant structural change. Thus, whereas [3·THF]n achieves a bent-ladder shape extended double chain Tl⋯[Pt⋯Tl]n⋯Pt supported by lateral bridging [Pt](μ-CN)[Tl] ligands, [4]4·dioxane is formed by discrete Pt4Tl4 rectangular aggregates stabilized by [Pt](μ-CN)[Tl] and Pt⋯Tl bonds, which are connected by dioxane bridging molecules through Tl⋯O(dioxane) additional contacts. Solid state emissions are redshifted compared with the mononuclear derivatives 1 and 2 and have been assigned, with the support of theoretical calculations on Pt4Tl4 models, to metal-metal'-to-ligand charge transfer (3MM'LCT [d/s σ*(Pt, Tl) → π*(C^N)]) for 3 and mixed 3MM'LCT/3IL for 4. In fluid THF solution, the complexes are not emissive. At 77 K, 3 and 4 exhibit bright emissions attributed to the formation of bimetallic [{Pt(C^N)(C6F5)(CN)}Tl(THF)x], and anionic [Pt(C^N)(C6F5)(CN)]- fragments. Furthermore, both 3 and 4 exhibit a reversible mechanochromism with a red shift of the emissions upon crushing, suggesting some degree of shortening of metal-metal separation. Finally, complex 3 shows solvatochromic behavior with color/luminescence changes by treatment with a drop of MeOH, CH2Cl2, THF or Et2O, with shifts from 583 in 3-MeOH to 639 nm in 3-THF. However, 4 only demonstrates a bathochromic response to MeOH.
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Affiliation(s)
- Mina Sadeghian
- Department of Chemistry, Shahid Beheshti University, Evin, Tehran 19839-69411, Iran.
- Departamento de Química, Instituto de Investigación en Química (IQUR), Complejo Científico Tecnológico, Universidad de La Rioja, 26006 Logroño, Spain.
| | - David Gómez de Segura
- Departamento de Química, Instituto de Investigación en Química (IQUR), Complejo Científico Tecnológico, Universidad de La Rioja, 26006 Logroño, Spain.
| | | | - Nasser Safari
- Department of Chemistry, Shahid Beheshti University, Evin, Tehran 19839-69411, Iran.
| | - Elena Lalinde
- Departamento de Química, Instituto de Investigación en Química (IQUR), Complejo Científico Tecnológico, Universidad de La Rioja, 26006 Logroño, Spain.
| | - M Teresa Moreno
- Departamento de Química, Instituto de Investigación en Química (IQUR), Complejo Científico Tecnológico, Universidad de La Rioja, 26006 Logroño, Spain.
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3
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Hertler PR, Yu X, Brower JD, Nguyen TAD, Wu G, Autschbach J, Hayton TW. Exploring Spin-Orbit Effects in a [Cu 6Tl] + Nanocluster Featuring an Uncommon Tl-H Interaction. Chemistry 2024; 30:e202400390. [PMID: 38381600 DOI: 10.1002/chem.202400390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 02/19/2024] [Accepted: 02/21/2024] [Indexed: 02/23/2024]
Abstract
Reaction of [CuH(PPh3)]6 with 1 equiv. of Tl(OTf) results in formation of [Cu6TlH6(PPh3)6][OTf] ([1]OTf]), which can be isolated in good yields. Variable-temperature 1H NMR spectroscopy, in combination with density functional theory (DFT) calculations, confirms the presence of a rare Tl-H orbital interaction. According to DFT, the 1H chemical shift of the Tl-adjacent hydride ligands of [1]+ includes 7.7 ppm of deshielding due to spin-orbit effects from the heavy Tl atom. This study provides valuable new insights into a rare class of metal hydrides, given that [1][OTf] is only the third isolable species reported to contain a Tl-H interaction.
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Affiliation(s)
- Phoebe R Hertler
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA, 93106
| | - Xiaojuan Yu
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, 14260
| | - Jordan D Brower
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA, 93106
| | - Thuy-Ai D Nguyen
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA, 93106
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA, 93106
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, 14260
| | - Trevor W Hayton
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA, 93106
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4
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Zhang Y, Pan X, Xu M, Xiong C, Hong D, Fang H, Cui P. Dinitrogen Complexes of Cobalt(-I) Supported by Rare-Earth Metal-Based Metalloligands. Inorg Chem 2023; 62:3836-3846. [PMID: 36800534 DOI: 10.1021/acs.inorgchem.2c04099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Sequential reactions of heptadentate phosphinoamine LH3 with rare-earth metal tris-alkyl precursor (Me3SiCH2)3Ln(THF)2 (Ln = Sc, Lu, Yb, Y, Gd) and a low-valent cobalt complex (Ph3P)3CoI afforded rare-earth metal-supported cobalt iodide complexes. Reduction of these iodide complexes under N2 allowed the isolation of the first series of dinitrogen complexes of Co(-I) featuring dative Co(-I) → Ln (Ln = Sc, Lu, Yb, Y, Gd) bonding interactions. These compounds were characterized by multinuclear NMR spectroscopy, X-ray diffraction analysis, electrochemistry, and computational studies. The correlation of N-N vibrational frequencies with the pKa of [Ln(H2O)6]3+ showed that strongest activation of N2 was achieved with the least Lewis acidic Gd(III) ion. Interestingly, these Ln-Co-N2 complexes catalyzed silylation of N2 in the presence of KC8 and Me3SiCl with turnover numbers (TONs) up to 16, where the lutetium-supported Co(-I) complex showed the highest activity within the series. The role of the Lewis acidic Ln(III) was crucial to achieve catalytic turnovers and tunable reactivity toward N2 functionalization.
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Affiliation(s)
- Yun Zhang
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, 189 South Jiuhua Road, Wuhu, Anhui 241002, P. R. China
| | - Xiaowei Pan
- School of Materials Science and Engineering, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, No. 38 Tongyan Road, Haihe Education Park, Tianjin 300350, P. R. China
| | - Min Xu
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, 189 South Jiuhua Road, Wuhu, Anhui 241002, P. R. China
| | - Chunyan Xiong
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, 189 South Jiuhua Road, Wuhu, Anhui 241002, P. R. China
| | - Dongjing Hong
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, 189 South Jiuhua Road, Wuhu, Anhui 241002, P. R. China
| | - Huayi Fang
- School of Materials Science and Engineering, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, No. 38 Tongyan Road, Haihe Education Park, Tianjin 300350, P. R. China
| | - Peng Cui
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, 189 South Jiuhua Road, Wuhu, Anhui 241002, P. R. China
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5
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Hidalgo N, de la Cruz-Martínez F, Martín MT, Nicasio MC, Campos J. A highly constrained cis-dihydride platinum complex trapped by cooperative gold/platinum dihydrogen activation. Chem Commun (Camb) 2022; 58:9144-9147. [PMID: 35894238 PMCID: PMC9367266 DOI: 10.1039/d2cc03089f] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of Au(i)/Pt(0) combinations that behave as bimetallic frustrated Lewis pairs activates dihydrogen in a cooperative manner. The steric bulk of the terphenyl phosphines that stabilize both fragments allows for the isolation of a rather unique and highly distorted cis-type dihydride platinum(ii) structure. We have trapped a unique square planar cis-dihydride structure, of relevance for many catalytic transformations, through a bimetallic FLP-based approach.![]()
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Affiliation(s)
- Nereida Hidalgo
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and Universidad de Sevilla, Avenida Américo Vespucio 49, Sevilla 41092, Spain.
| | - Felipe de la Cruz-Martínez
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and Universidad de Sevilla, Avenida Américo Vespucio 49, Sevilla 41092, Spain.
| | - M Trinidad Martín
- Departamento de Química Inorgánica, Universidad de Sevilla, Aptdo 1203, Sevilla 41071, Spain.
| | - M Carmen Nicasio
- Departamento de Química Inorgánica, Universidad de Sevilla, Aptdo 1203, Sevilla 41071, Spain.
| | - Jesús Campos
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and Universidad de Sevilla, Avenida Américo Vespucio 49, Sevilla 41092, Spain.
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6
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Du J, He X, Hong D, Zhou S, Fang H, Cui P. Phosphinoamido Ligand Supported Heterobimetallic Rare-Earth Metal-Palladium Complexes: Versatile Structures and Redox Reactivities. Dalton Trans 2022; 51:8777-8785. [DOI: 10.1039/d2dt01084d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heterobimetallic Ln(III)-Pd(0) complexes (Ln = Y, Sm, Gd, Yb) featuring tetranuclear structures with COD as bridges were obtained via the metallation of tris(phosphinoamido) rare-earth metal complexes [Ph2PNAd]3Ln (Ad = admantyl)...
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7
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Lyczko K, Lyczko M, Banasiewicz M, Wegrzynska K, Ziółko A, Baraniak A, Dobrowolski JC. Thallium(I) Tropolonates: Synthesis, Structure, Spectral Characteristics, and Antimicrobial Activity Compared to Lead(II) and Bismuth(III) Analogues. Molecules 2021; 27:molecules27010183. [PMID: 35011415 PMCID: PMC8746424 DOI: 10.3390/molecules27010183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 12/27/2021] [Accepted: 12/27/2021] [Indexed: 11/16/2022] Open
Abstract
Synthesis, single-crystal X-ray determination diffraction and FT-IR, NMR (1H, 13C, 19F and 205Tl), UV–vis, and luminescence spectra characteristics were described for series of thallium(I) compounds: thallium(I) triflate (Tl(OTf)), 1:1 co-crystals of thallium(I) triflate and tropolone (Htrop), Tl(OTf)·Htrop, as well as simple thallium(I) chelates: Tl(trop) (1), Tl(5-metrop) (2), Tl(hino) (3), with Htrop, 5-methyltropolone (5-meHtrop), 4-isopropyltropolone (hinokitiol, Hhino), respectively, and additionally more complex {Tl@[Tl(hino)]6}(OTf) (4) compound. Comparison of their antimicrobial activity with selected lead(II) and bismuth(III) analogs and free ligands showed that only bismuth(III) complexes demonstrated significant antimicrobial activity, from two- to fivefold larger than the free ligands.
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Affiliation(s)
- Krzysztof Lyczko
- Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (M.L.); (J.C.D.)
- Correspondence:
| | - Monika Lyczko
- Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (M.L.); (J.C.D.)
| | | | - Karolina Wegrzynska
- National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland; (K.W.); (A.Z.); (A.B.)
| | - Anna Ziółko
- National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland; (K.W.); (A.Z.); (A.B.)
| | - Anna Baraniak
- National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland; (K.W.); (A.Z.); (A.B.)
| | - Jan Cz. Dobrowolski
- Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (M.L.); (J.C.D.)
- National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland; (K.W.); (A.Z.); (A.B.)
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8
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Ghosh B, Fantuzzi F, Phukan AK. Understanding, Modulating, and Leveraging Transannular M → Z Interactions. Inorg Chem 2021; 60:12790-12800. [PMID: 34424687 DOI: 10.1021/acs.inorgchem.1c00977] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Density functional theory calculations have been performed on metallatranes featuring a group 13 elements at the bridgehead position to understand the factors that influence the nature of the M···Z (M = Fe, Co, Ni; Z = Al, Ga, In) interaction present in these complexes and the resultant reactivity at the metal center. The strength of the M···Z interaction increases with the increase in the size and polarizability of the bridgehead group 13 elements. The calculated reaction free energies (ΔG° values) for binding of different Lewis bases to the metallatranes are found to be significantly more exergonic for the larger In(III) ions. Quantum theory of atoms in molecules calculations reveal the covalent nature of the M···Z interactions, while the EDA-NOCV analysis indicates the strong binding ability of these metallatranes not only to different σ-donor and π-acceptor ligands but also to relatively inert species, such as N2.
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Affiliation(s)
- Bijoy Ghosh
- Department of Chemical Sciences, Tezpur University, Napaam 784028, Assam, India
| | - Felipe Fantuzzi
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Ashwini K Phukan
- Department of Chemical Sciences, Tezpur University, Napaam 784028, Assam, India
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Cui P, Wu C, Du J, Luo G, Huang Z, Zhou S. Three-Coordinate Pd(0) with Rare-Earth Metalloligands: Synergetic CO Activation and Double P-C Bond Cleavage-Formation Reactions. Inorg Chem 2021; 60:9688-9699. [PMID: 34125520 DOI: 10.1021/acs.inorgchem.1c00990] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Metalation of β-diketiminato rare-earth metal complexes LnacnacLn(PhNCH2PPh2)2 (Ln = Y, Yb, Lu) with (COD)Pd(CH2SiMe3)2 afforded three-coordinate Pd(0) complexes supported by two sterically less bulky phosphines and a Pd → Ln dative interaction. The Pd(0) center is prone to ligation with isonitrile and CO; in the latter case, the insertion of a second CO with the Y-N bond was assisted via a precoordination of CO on the Pd(0) center, which led to the formation of an anionic Pd(0) carbamoyl. The reaction of the Pd-Y complex with iodobenzene showed a remarkable double P-C bond cleavage-formation pathway within the heterobimetallic Pd-Y core to afford (Ph3P)2PdI(Ph), imine PhNCH2, and a β-diketiminato yttrium diiodide. In the related reaction of LnacnacY(PhNCH2PPh2)2 with (Ph3P)2PdI(Ph), the P-C bond cleavage following with a N-C bond formation was observed. Computational studies revealed a synergetic bimetallic mechanism for these reactions.
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Affiliation(s)
- Peng Cui
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P. R. China
| | - Changjiang Wu
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P. R. China
| | - Jun Du
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P. R. China
| | - Gen Luo
- Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, P. R. China
| | - Zeming Huang
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P. R. China
| | - Shuangliu Zhou
- Key Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P. R. China
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10
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Bajo S, Alférez MG, Alcaide MM, López‐Serrano J, Campos J. Metal-only Lewis Pairs of Rhodium with s, p and d-Block Metals. Chemistry 2020; 26:16833-16845. [PMID: 32722855 PMCID: PMC7756578 DOI: 10.1002/chem.202003167] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/27/2020] [Indexed: 12/22/2022]
Abstract
Metal-only Lewis pairs (MOLPs) in which the two metal fragments are solely connected by a dative M→M bond represent privileged architectures to acquire fundamental understanding of bimetallic bonding. This has important implications in many catalytic processes or supramolecular systems that rely on synergistic effects between two metals. However, a systematic experimental/computational approach on a well-defined class of compounds is lacking. Here we report a family of MOLPs constructed around the RhI precursor [(η5 -C5 Me5 )Rh(PMe3 )2 ] (1) with a series of s, p and d-block metals, mostly from the main group elements, and investigate their bonding by computational means. Among the new MOLPs, we have structurally characterized those formed by dative bonding between 1 and MgMeBr, AlMe3 , GeCl2 , SnCl2 , ZnMe2 and Zn(C6 F5 )2, as well as spectroscopically identified the ones resulting from coordination to MBArF (M=Na, Li; BArF - =[B(C6 H2 -3,5-(CF3 )2 )4 ]- ) and CuCl. Some of these compounds represent unique examples of bimetallic structures, such as the first unambiguous cases of Rh→Mg dative bonding or base-free rhodium bound germylene and stannylene species. Multinuclear NMR spectroscopy, including 103 Rh NMR, is used to probe the formation of Rh→M bonds. A comprehensive theoretical analysis of those provides clear trends. As anticipated, greater bond covalency is found for the more electronegative acids, whereas ionic character dominates for the least electronegative nuclei, though some degree of electron sharing is identified in all cases.
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Affiliation(s)
- Sonia Bajo
- Instituto de Investigaciones Químicas (IIQ)Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)Consejo Superior de Investigaciones Científicas (CSIC)University of SevillaAvenida Américo Vespucio 4941092SevillaSpain
| | - Macarena G. Alférez
- Instituto de Investigaciones Químicas (IIQ)Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)Consejo Superior de Investigaciones Científicas (CSIC)University of SevillaAvenida Américo Vespucio 4941092SevillaSpain
| | - María M. Alcaide
- Instituto de Investigaciones Químicas (IIQ)Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)Consejo Superior de Investigaciones Científicas (CSIC)University of SevillaAvenida Américo Vespucio 4941092SevillaSpain
| | - Joaquín López‐Serrano
- Instituto de Investigaciones Químicas (IIQ)Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)Consejo Superior de Investigaciones Científicas (CSIC)University of SevillaAvenida Américo Vespucio 4941092SevillaSpain
| | - Jesús Campos
- Instituto de Investigaciones Químicas (IIQ)Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)Consejo Superior de Investigaciones Científicas (CSIC)University of SevillaAvenida Américo Vespucio 4941092SevillaSpain
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11
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Huang YC, Chen HY, Chang YL, Vasanthakumar P, Chen SY, Kao CL, Wu CHY, Hsu SC. Synthesis of triisocyanomesitylene β‑diketiminato copper(I) complexes and evaluation of isocyanide π-back bonding. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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12
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Hidalgo N, Moreno JJ, Pérez-Jiménez M, Maya C, López-Serrano J, Campos J. Evidence for Genuine Bimetallic Frustrated Lewis Pair Activation of Dihydrogen with Gold(I)/Platinum(0) Systems. Chemistry 2020; 26:5982-5993. [PMID: 31971290 DOI: 10.1002/chem.201905793] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 01/22/2020] [Indexed: 01/07/2023]
Abstract
A joint experimental/computational effort to elucidate the mechanism of dihydrogen activation by a gold(I)/platinum(0) metal-only frustrated Lewis pair (FLP) is described herein. The drastic effects on H2 activation derived from subtle ligand modifications have also been investigated. The importance of the balance between bimetallic adduct formation and complete frustration has been interrogated, providing for the first time evidence for genuine metal-only FLP reactivity in solution. The origin of a strong inverse kinetic isotopic effect has also been clarified, offering further support for the proposed bimetallic FLP-type cleavage of dihydrogen.
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Affiliation(s)
- Nereida Hidalgo
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and, University of Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Juan José Moreno
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and, University of Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Marina Pérez-Jiménez
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and, University of Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Celia Maya
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and, University of Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Joaquín López-Serrano
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and, University of Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Jesús Campos
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and, University of Sevilla, Avenida Américo Vespucio 49, 41092, Sevilla, Spain
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13
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Heterobimetallic PtII–AgI complex supported by diphenyl(2-pyrimidyl)phosphine: Synthesis and thermochromic photoluminescence. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.107862] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Cui P, Xiong C, Du J, Huang Z, Xie S, Wang H, Zhou S, Fang H, Wang S. Heterobimetallic scandium–group 10 metal complexes with LM → Sc (LM = Ni, Pd, Pt) dative bonds. Dalton Trans 2020; 49:124-130. [DOI: 10.1039/c9dt04369a] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Heterobimetallic scandium–group 10 metal complexes featuring notable LM → Sc (LM = Ni, Pd, Pt) dative bonding interactions.
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Affiliation(s)
- Peng Cui
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Chunyan Xiong
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Jun Du
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Zeming Huang
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Sijun Xie
- Department of Chemistry
- Fudan University
- Shanghai 200438
- P. R. China
| | - Hua Wang
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Shuangliu Zhou
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Huayi Fang
- Department of Chemistry
- Fudan University
- Shanghai 200438
- P. R. China
| | - Shaowu Wang
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
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15
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Wilkins LC, Kim Y, Litle ED, Gabbaï FP. Stabilized Carbenium Ions as Latent, Z‐type Ligands. Angew Chem Int Ed Engl 2019; 58:18266-18270. [DOI: 10.1002/anie.201911662] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Indexed: 12/30/2022]
Affiliation(s)
- Lewis C. Wilkins
- Department of ChemistryTexas A&M University College Station TX 77843 USA
| | - Youngmin Kim
- Department of ChemistryTexas A&M University College Station TX 77843 USA
| | - Elishua D. Litle
- Department of ChemistryTexas A&M University College Station TX 77843 USA
| | - François P. Gabbaï
- Department of ChemistryTexas A&M University College Station TX 77843 USA
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16
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Wilkins LC, Kim Y, Litle ED, Gabbaï FP. Stabilized Carbenium Ions as Latent, Z‐type Ligands. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201911662] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Lewis C. Wilkins
- Department of ChemistryTexas A&M University College Station TX 77843 USA
| | - Youngmin Kim
- Department of ChemistryTexas A&M University College Station TX 77843 USA
| | - Elishua D. Litle
- Department of ChemistryTexas A&M University College Station TX 77843 USA
| | - François P. Gabbaï
- Department of ChemistryTexas A&M University College Station TX 77843 USA
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17
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18
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Hidalgo N, Maya C, Campos J. Cooperative activation of X-H (X = H, C, O, N) bonds by a Pt(0)/Ag(i) metal-only Lewis pair. Chem Commun (Camb) 2019; 55:8812-8815. [PMID: 31120065 DOI: 10.1039/c9cc03008e] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Metal-only Lewis pairs made of Pt(0)/Ag(i) combinations have been previously reported, but their cooperative reactivity remains unexplored. Here we demonstrate that these systems are capable of synergistically activating a wide variety of X-H (X = H, C, O, N) bonds, including those in dihydrogen, alkynes, water and ammonia.
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Affiliation(s)
- Nereida Hidalgo
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Sevilla and Consejo Superior de Investigaciones Científicas (CSIC), Avenida Américo Vespucio 49, 41092 Sevilla, Spain.
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19
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Du J, Huang Z, Zhang Y, Wang S, Zhou S, Fang H, Cui P. A Scandium Metalloligand‐Based Heterobimetallic Pd−Sc Complex: Electronic Tuning Through a Very Short Pd→Sc Dative Bond. Chemistry 2019; 25:10149-10155. [DOI: 10.1002/chem.201901424] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 05/22/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Jun Du
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials ScienceAnhui Normal University 189 S. Jiuhua Road Wuhu Anhui 241002 P.R. China
| | - Zeming Huang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials ScienceAnhui Normal University 189 S. Jiuhua Road Wuhu Anhui 241002 P.R. China
| | - Yanan Zhang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials ScienceAnhui Normal University 189 S. Jiuhua Road Wuhu Anhui 241002 P.R. China
| | - Shaowu Wang
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials ScienceAnhui Normal University 189 S. Jiuhua Road Wuhu Anhui 241002 P.R. China
| | - Shuangliu Zhou
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials ScienceAnhui Normal University 189 S. Jiuhua Road Wuhu Anhui 241002 P.R. China
| | - Huayi Fang
- Department of ChemistryFudan University No. 2205 Songhu Road, Yangpu District Shanghai 200438 P.R. China
| | - Peng Cui
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials ScienceAnhui Normal University 189 S. Jiuhua Road Wuhu Anhui 241002 P.R. China
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20
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Lo Y, Gabbaï FP. An Antimony(V) Dication as a Z‐Type Ligand: Turning on Styrene Activation at Gold. Angew Chem Int Ed Engl 2019; 58:10194-10197. [DOI: 10.1002/anie.201903964] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Indexed: 12/28/2022]
Affiliation(s)
- Ying‐Hao Lo
- Department of Chemistry Texas A&M University College Station TX 77843 USA
| | - François P. Gabbaï
- Department of Chemistry Texas A&M University College Station TX 77843 USA
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21
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Lo Y, Gabbaï FP. An Antimony(V) Dication as a Z‐Type Ligand: Turning on Styrene Activation at Gold. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903964] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Ying‐Hao Lo
- Department of Chemistry Texas A&M University College Station TX 77843 USA
| | - François P. Gabbaï
- Department of Chemistry Texas A&M University College Station TX 77843 USA
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22
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Cammarota RC, Xie J, Burgess SA, Vollmer MV, Vogiatzis KD, Ye J, Linehan JC, Appel AM, Hoffmann C, Wang X, Young VG, Lu CC. Thermodynamic and kinetic studies of H 2 and N 2 binding to bimetallic nickel-group 13 complexes and neutron structure of a Ni(η 2-H 2) adduct. Chem Sci 2019; 10:7029-7042. [PMID: 31588270 PMCID: PMC6676469 DOI: 10.1039/c9sc02018g] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 06/08/2019] [Indexed: 12/17/2022] Open
Abstract
Binding energies for H2 and N2 at nickel become more exergonic for the larger group 13 sigma-accepting supports.
Understanding H2 binding and activation is important in the context of designing transition metal catalysts for many processes, including hydrogenation and the interconversion of H2 with protons and electrons. This work reports the first thermodynamic and kinetic H2 binding studies for an isostructural series of first-row metal complexes: NiML, where M = Al (1), Ga (2), and In (3), and L = [N(o-(NCH2PiPr2)C6H4)3]3–. Thermodynamic free energies (ΔG°) and free energies of activation (ΔG‡) for binding equilibria were obtained via variable-temperature 31P NMR studies and lineshape analysis. The supporting metal exerts a large influence on the thermodynamic favorability of both H2 and N2 binding to Ni, with ΔG° values for H2 binding found to span nearly the entire range of previous reports. The non-classical H2 adduct, (η2-H2)NiInL (3-H2), was structurally characterized by single-crystal neutron diffraction—the first such study for a Ni(η2-H2) complex or any d10 M(η2-H2) complex. UV-Vis studies and TD-DFT calculations identified specific electronic structure perturbations of the supporting metal which poise NiML complexes for small-molecule binding. ETS-NOCV calculations indicate that H2 binding primarily occurs via H–H σ-donation to the Ni 4pz-based LUMO, which is proposed to become energetically accessible as the Ni(0)→M(iii) dative interaction increases for the larger M(iii) ions. Linear free-energy relationships are discussed, with the activation barrier for H2 binding (ΔG‡) found to decrease proportionally for more thermodynamically favorable equilibria. The ΔG° values for H2 and N2 binding to NiML complexes were also found to be more exergonic for the larger M(iii) ions.
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Affiliation(s)
- Ryan C Cammarota
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA .
| | - Jing Xie
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA . .,Supercomputing Institute , Chemical Theory Center , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA.,Key Laboratory of Cluster Science of Ministry of Education , School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , China
| | - Samantha A Burgess
- Catalysis Science Group , Pacific Northwest National Laboratory , P. O. Box 999 , MS K2-57 , Richland , Washington 99352 , USA
| | - Matthew V Vollmer
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA .
| | - Konstantinos D Vogiatzis
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA . .,Supercomputing Institute , Chemical Theory Center , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA.,Department of Chemistry , University of Tennessee , Knoxville , Tennessee 37996 , USA
| | - Jingyun Ye
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA . .,Supercomputing Institute , Chemical Theory Center , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA
| | - John C Linehan
- Catalysis Science Group , Pacific Northwest National Laboratory , P. O. Box 999 , MS K2-57 , Richland , Washington 99352 , USA
| | - Aaron M Appel
- Catalysis Science Group , Pacific Northwest National Laboratory , P. O. Box 999 , MS K2-57 , Richland , Washington 99352 , USA
| | - Christina Hoffmann
- Neutron Scattering Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , USA
| | - Xiaoping Wang
- Neutron Scattering Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , USA
| | - Victor G Young
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA .
| | - Connie C Lu
- Department of Chemistry , University of Minnesota-Twin Cities , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , USA .
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23
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Ramirez BL, Sharma P, Eisenhart RJ, Gagliardi L, Lu CC. Bimetallic nickel-lutetium complexes: tuning the properties and catalytic hydrogenation activity of the Ni site by varying the Lu coordination environment. Chem Sci 2019; 10:3375-3384. [PMID: 30996926 PMCID: PMC6429466 DOI: 10.1039/c8sc04712j] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 02/03/2019] [Indexed: 12/31/2022] Open
Abstract
We present three heterobimetallic complexes containing an isostructural nickel center and a lutetium ion in varying coordination environments. The bidentate iPr2PCH2NHPh and nonadentate (iPr2PCH2NHAr)3tacn ligands were used to prepare the Lu metalloligands, Lu(iPr2PCH2NPh)3 (1) and Lu{(iPr2PCH2NAr)3tacn} (2), respectively. Reaction of Ni(COD)2 (where COD is 1,5-cyclooctadiene) and 1 afforded NiLu(iPr2PCH2NPh)3 (3), with a Lu coordination number (CN) of 4 and a Ni-Lu distance, d(Ni-Lu), of 2.4644(2) Å. Complex 3 can further bind THF to form 3-THF, increasing both the Lu CN to 5 and d(Ni-Lu) to 2.5989(4) Å. On the other hand, incorporation of Ni(0) into 2 provides NiLu{(iPr2PCH2NAr)3tacn} (4), in which the Lu coordination environment is more saturated (CN = 6), and the d(Ni-Lu) is substantially elongated at 2.9771(5) Å. Cyclic voltammetry of the three Ni-Lu complexes shows an overall ∼410 mV shift in the Ni(0/I) redox couple, suggesting tunability of the Ni electronics across the series. Computational studies reveal polarized bonding interactions between the Ni 3d z 2 (major) and the Lu 5d z 2 (minor) orbitals, where the percentage of Lu character increases in the order: 4 (6.0% Lu 5d z 2 ) < 3-THF (8.5%) < 3 (9.3%). All three Ni-Lu complexes bind H2 at low temperatures (-30 to -80 °C) and are competent catalysts for styrene hydrogenation. Complex 3 outperforms 4 with a four-fold faster rate. Additionally, adding increasing THF equivalents to 3, which would favor build-up of 3-THF, decreases the rate. We propose that altering the coordination sphere of the Lu support can influence the resulting properties and catalytic activity of the active Ni(0) metal center.
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Affiliation(s)
- Bianca L Ramirez
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455-0431 , USA .
| | - Prachi Sharma
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455-0431 , USA . .,Minnesota Supercomputing Institute , Chemical Theory Center , University of Minnesota , Minneapolis , Minnesota 55455-0431 , USA
| | - Reed J Eisenhart
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455-0431 , USA .
| | - Laura Gagliardi
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455-0431 , USA . .,Minnesota Supercomputing Institute , Chemical Theory Center , University of Minnesota , Minneapolis , Minnesota 55455-0431 , USA
| | - Connie C Lu
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455-0431 , USA .
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24
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You D, Yang H, Sen S, Gabbaï FP. Modulating the σ-Accepting Properties of an Antimony Z-type Ligand via Anion Abstraction: Remote-Controlled Reactivity of the Coordinated Platinum Atom. J Am Chem Soc 2018; 140:9644-9651. [PMID: 29979870 DOI: 10.1021/jacs.8b05520] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In search of ligand platforms, which can be used to remotely control the catalytic activity of a transition metal, we have investigated the coordination noninnocence of ambiphilic L2/Z-type ligands containing a trifluorostiborane unit as a Lewis acid. The known dichlorostiboranyl platinum complex (( o-(Ph2P)C6H4)2SbCl2)PtCl (1) reacts with TlF in the presence of acetonitrile (MeCN) and cyclohexyl isocyanide (CyNC) to afford the trifluorostiborane platinum complexes 2 ((( o-(Ph2P)C6H4)2SbF3)Pt-NCMe) and 3 ((( o-(Ph2P)C6H4)2SbF3)Pt-CNCy), respectively. Formation of these complexes, which results from a redistribution of the halide ligands about the dinuclear core, affects the nature of the Pt-Sb bond. The latter switches from covalent in 1 to polar covalent (or dative) in 2 and 3 where the trifluorostiborane moiety engages the platinum center in a Pt → Sb interaction. The polarity of the Pt-Sb bond can be modulated further by abstraction of an antimony-bound fluoride ligand using B(C6F5)3. These reactions afford the cationic complexes [(( o-(Ph2P)C6H4)2SbF2)Pt-NCMe]+ ([5]+) and [(( o-(Ph2P)C6H4)2SbF2)Pt-CNCy]+ ([6]+) which have been isolated as [BF(C6F5)3]- salts. These complexes possess a highly Lewis acidic difluorostibonium moiety, which exerts an intense draw on the electron density of the platinum center. As a result, the latter becomes significantly more electrophilic. In the case of [5]+, which contains a labile acetonitrile ligand, this increased electrophilicity translates into increased carbophilicity as reflected by the ability of this complex to promote enyne cyclization reactions. These results demonstrate that the coordination noninnocence of antimony Z-ligands can be used to adjust the catalytic activity of an adjoining metal center.
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Affiliation(s)
- Di You
- Department of Chemistry , Texas A&M University , College Station , Texas 77843-3255 , United States
| | - Haifeng Yang
- Department of Chemistry , Texas A&M University , College Station , Texas 77843-3255 , United States
| | - Srobona Sen
- Department of Chemistry , Texas A&M University , College Station , Texas 77843-3255 , United States
| | - François P Gabbaï
- Department of Chemistry , Texas A&M University , College Station , Texas 77843-3255 , United States
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25
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Berenguer JR, Lalinde E, Moreno MT. Luminescent cyclometalated-pentafluorophenyl Pt II , Pt IV and heteropolynuclear complexes. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.04.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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26
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Barnett BR, Figueroa JS. Zero-valent isocyanides of nickel, palladium and platinum as transition metal σ-type Lewis bases. Chem Commun (Camb) 2018; 52:13829-13839. [PMID: 27826607 DOI: 10.1039/c6cc07863j] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Transition metal complexes that contain metal-to-ligand retrodative σ-bonds have become the subject of increasing studies over the last decade. Lewis acidic "Z-type ligands" can modulate the electronic structure of their resultant complexes in a manner distinct from 2e- donor ligands, and can also engage in cooperative reactivity with a Lewis basic transition metal. In this Feature article, we summarize our work with transition metal isocyanide complexes of group 10 metals that have exploited metal-based σ-type Lewis basicity. While the complexes Ni(CNArMes2)3, Pd(CNArDipp2)2 and Pt(CNArDipp2)2 were initially targeted as analogues to unstable, low-coordinate metal carbonyls, it soon became apparent that these zero-valent metal centers bore appreciable Lewis basic qualities due largely to the enhanced σ-donor/π-acid ratio of isocyanides compared to CO. Detailed spectroscopic and structural studies of metal-only Lewis pairs (MOLPs) formed from these complexes have furthered our understanding of the electronic structure perturbations effected by Z-type ligand binding. In addition, the platinum (boryl)iminomethane (BIM) complex Pt(κ2-N,B-Cy2BIM)(CNArDipp2) has illuminated a general ligand design strategy that can engender significant reverse-dative interactions with buttressed Lewis acids, and also has expanded the known scope of cooperative reactivity that can be realized at a transition metal-borane linkage.
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Affiliation(s)
- Brandon R Barnett
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive MC 0358, La Jolla, California 92093, USA.
| | - Joshua S Figueroa
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive MC 0358, La Jolla, California 92093, USA.
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27
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You D, Gabbaï FP. Unmasking the Catalytic Activity of a Platinum Complex with a Lewis Acidic, Non-innocent Antimony Ligand. J Am Chem Soc 2017; 139:6843-6846. [PMID: 28485973 DOI: 10.1021/jacs.7b03287] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
With the view of developing self-activating electrophilic catalysts, we are now investigating complexes with a Lewis acidic moiety in the immediate vicinity of the transition metal center. Toward this end, we have synthesized a platinum complex in which the metal is connected to a Lewis acidic bis(triflato)stiboranyl ligand. This complex, ((o-(Ph2P)C6H4)2SbOTf2)PtCl (2), which was obtained by treatment of ((o-(Ph2P)C6H4)2SbCl2)PtCl (1) with 2 equiv of AgOTf, is surprisingly air stable. Yet, it promptly reacts with cyclohexylisocyanide to afford the dicationic chlorostibine complex [((o-(Ph2P)C6H4)2SbCl)PtCNCy]2+ ([3]2+) as a bis-triflate salt. Formation of [3]2+ occurs through abstraction of the platinum-bound chloride ligand by the adjacent Lewis acidic antimony center. This halide migration reaction leads to activation of the platinum center. In turn, 2 behaves as a self-activating catalyst in reactions involving alkynes and readily mediates both enyne cyclization and intramolecular hydroarylation reactions, at room temperature, without addition of a chloride abstracting reagent. These results demonstrate that the coordination non-innocence of antimony ligands can be exploited for the purpose of electrophilic catalysis.
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Affiliation(s)
- Di You
- Department of Chemistry, Texas A&M University , College Station, Texas 77843, United States
| | - François P Gabbaï
- Department of Chemistry, Texas A&M University , College Station, Texas 77843, United States
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28
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Agnew DW, Moore CE, Rheingold AL, Figueroa JS. Comparison of nucleophilic- and radical-based routes to the formation of manganese-main group element single bonds. Dalton Trans 2017; 46:6700-6707. [DOI: 10.1039/c7dt01102d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
One-electron activation of main-group substrates by a stable manganese metalloradical provides a facile pathway to Mn-element single bonds.
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Affiliation(s)
- Douglas W. Agnew
- Department of Chemistry and Biochemistry
- University of California
- La Jolla
- USA
| | - Curtis E. Moore
- Department of Chemistry and Biochemistry
- University of California
- La Jolla
- USA
| | | | - Joshua S. Figueroa
- Department of Chemistry and Biochemistry
- University of California
- La Jolla
- USA
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29
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Baddour FG, Hyre AS, Guillet JL, Pascual D, Lopez-de-Luzuriaga JM, Alam TM, Bacon JW, Doerrer LH. Pt–Mg, Pt–Ca, and Pt–Zn Lantern Complexes and Metal-Only Donor–Acceptor Interactions. Inorg Chem 2016; 56:452-469. [DOI: 10.1021/acs.inorgchem.6b02372] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Frederick G. Baddour
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Ariel S. Hyre
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Jesse L. Guillet
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - David Pascual
- Departamento
de Química, Centro de Investigación en Síntesis
Química, Universidad de La Rioja, Madre de Dios, 51, 26004 Logroño, Spain
| | - José Maria Lopez-de-Luzuriaga
- Departamento
de Química, Centro de Investigación en Síntesis
Química, Universidad de La Rioja, Madre de Dios, 51, 26004 Logroño, Spain
| | - Todd M. Alam
- Department of Organic Material Science, Sandia National Laboratories, Albuquerque, New Mexico 87185-0886, United States
| | - Jeffrey W. Bacon
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Linda H. Doerrer
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
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30
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Berenguer JR, Lalinde E, Martín A, Moreno MT, Sánchez S, Shahsavari HR. Binuclear Complexes and Extended Chains Featuring PtII–TlI Bonds: Influence of the Pyridine-2-Thiolate and Cyclometalated Ligands on the Self-Assembly and Luminescent Behavior. Inorg Chem 2016; 55:7866-78. [DOI: 10.1021/acs.inorgchem.6b00699] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jesús R. Berenguer
- Departamento
de Química, Centro de Síntesis Química de La
Rioja, Universidad de La Rioja, Logroño 26006, Spain
| | - Elena Lalinde
- Departamento
de Química, Centro de Síntesis Química de La
Rioja, Universidad de La Rioja, Logroño 26006, Spain
| | - Antonio Martín
- Departamento de Química Inorgánica,
Instituto de Síntesis Química y Catálisis Homogénea. Universidad de Zaragoza, CSIC, Zaragoza 50009, Spain
| | - M. Teresa Moreno
- Departamento
de Química, Centro de Síntesis Química de La
Rioja, Universidad de La Rioja, Logroño 26006, Spain
| | - Sergio Sánchez
- School of Chemistry, University of Manchester, Oxford
Road, Manchester M13 9PL, U.K
| | - Hamid R. Shahsavari
- Departamento
de Química, Centro de Síntesis Química de La
Rioja, Universidad de La Rioja, Logroño 26006, Spain
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences, Yousef Sobouti Boulevard, Zanjan 45195-1159, Iran
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31
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Bissert R, Braunschweig H, Dewhurst RD, Schneider C. Metal-Only Lewis Pairs Based on Zerovalent Osmium. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00495] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Robin Bissert
- Institut für Anorganische
Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Holger Braunschweig
- Institut für Anorganische
Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Rian D. Dewhurst
- Institut für Anorganische
Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Christoph Schneider
- Institut für Anorganische
Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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32
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Barnett BR, Rheingold AL, Figueroa JS. Monomeric Chini‐Type Triplatinum Clusters Featuring Dianionic and Radical‐Anionic π*‐Systems. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604903] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Brandon R. Barnett
- Department of Chemistry and Biochemistry University of California, San Diego 9500 Gilman Drive MC 0358 La Jolla CA 92193 USA
| | - Arnold L. Rheingold
- Department of Chemistry and Biochemistry University of California, San Diego 9500 Gilman Drive MC 0358 La Jolla CA 92193 USA
| | - Joshua S. Figueroa
- Department of Chemistry and Biochemistry University of California, San Diego 9500 Gilman Drive MC 0358 La Jolla CA 92193 USA
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33
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Barnett BR, Rheingold AL, Figueroa JS. Monomeric Chini-Type Triplatinum Clusters Featuring Dianionic and Radical-Anionic π*-Systems. Angew Chem Int Ed Engl 2016; 55:9253-8. [PMID: 27346691 DOI: 10.1002/anie.201604903] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Indexed: 11/08/2022]
Abstract
Owing to their unique topologies and abilities to self-assemble into a variety of extended and aggregated structures, the binary platinum carbonyl clusters [Pt3 (CO)6 ]n (2-) ("Chini clusters") continue to draw significant interest. Herein, we report the isolation and structural characterization of the trinuclear electron-transfer series [Pt3 (μ-CO)3 (CNAr(Dipp2) )3 ](n-) (n=0, 1, 2), which represents a unique set of monomeric Pt3 clusters supported by π-acidic ligands. Spectroscopic, computational, and synthetic investigations demonstrate that the highest-occupied molecular orbitals of the mono- and dianionic clusters consist of a combined π*-framework of the CO and CNAr(Dipp2) ligands, with negligible Pt character. Accordingly, this study provides precedent for an ensemble of carbonyl and isocyanide ligands to function in a redox non-innocent manner.
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Affiliation(s)
- Brandon R Barnett
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive MC 0358, La Jolla, CA, 92193, USA
| | - Arnold L Rheingold
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive MC 0358, La Jolla, CA, 92193, USA
| | - Joshua S Figueroa
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive MC 0358, La Jolla, CA, 92193, USA.
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34
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Carpenter AE, Rheingold AL, Figueroa JS. A Well-Defined Isocyano Analogue of HCo(CO)4. 1: Synthesis, Decomposition, and Catalytic 1,1-Hydrogenation of Isocyanides. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00297] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alex E. Carpenter
- Department of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman
Drive, Mail Code 0358, La Jolla, California 92093-0358, United States
| | - Arnold L. Rheingold
- Department of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman
Drive, Mail Code 0358, La Jolla, California 92093-0358, United States
| | - Joshua S. Figueroa
- Department of Chemistry and
Biochemistry, University of California, San Diego, 9500 Gilman
Drive, Mail Code 0358, La Jolla, California 92093-0358, United States
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35
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Jones JS, Gabbaï FP. Coordination- and Redox-Noninnocent Behavior of Ambiphilic Ligands Containing Antimony. Acc Chem Res 2016; 49:857-67. [PMID: 27092722 DOI: 10.1021/acs.accounts.5b00543] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Stimulated by applications in catalysis, the chemistry of ambiphilic ligands featuring both donor and acceptor functionalities has experienced substantial growth in the past several years. The unique opportunities in catalysis offered by ambiphilic ligands stem from the ability of their acceptor functionalities to play key roles via metal-ligand cooperation or modulation of the reactivity of the metal center. Ligands featuring group 13 centers, most notably boranes, as their acceptor functionalities have undoubtedly spearheaded these developments, with remarkable results having been achieved in catalytic hydrogenation and hydrosilylation. Motivated by these developments as well as by our fundamental interest in the chemistry of heavy group 15 elements, we became fascinated by the possibility of employing antimony centers as Lewis acids within ambiphilic ligands. The chemistry of antimony-based ligands, most often encountered as trivalent stibines, has historically been considered to mirror that of their lighter phosphorus-based congeners. There is growing evidence, however, that antimony-based ligands may display unique coordination behavior and reactivity. Additionally, despite the diverse Lewis acid and redox chemistry that antimony exhibits, there have been only limited efforts to explore this chemistry within the coordination sphere of a transition metal. By incorporation of antimony into the framework of polydentate ligands in order to enforce the main group metal-transition metal interaction, the effect of redox and coordination events at the antimony center on the structure, electronics, and reactivity of the metal complex may be investigated. This Account describes our group's continuing efforts to probe the coordination behavior, reactivity, and application of ambiphilic ligands incorporating antimony centers. Structural and theoretical studies have established that both Sb(III) and Sb(V) centers in polydentate ligands may act as Z-type ligands toward late transition metals. Although coordinated to a metal, the antimony centers in these complexes retain residual Lewis acidity, as evidenced by their ability to participate in anion binding. Anion binding events at the antimony center have been shown by structural, spectroscopic, and theoretical studies to perturb the antimony-transition metal interaction and in some cases to trigger reactivity at the metal center. Coordinated Sb(III) centers in polydentate ligands have also been found to readily undergo two-electron oxidation, generating strongly Lewis acidic Sb(V) centers in the coordination sphere of the metal. Theoretical studies suggest that oxidation of the coordinated antimony center induces an umpolung of the antimony-metal bond, resulting in depletion of electron density at the metal center. In addition to elucidating the fundamental coordination and redox chemistry of antimony-containing ambiphilic ligands, our work has demonstrated that these unusual behaviors show promise for use in a variety of applications. The ability of coordinated antimony centers to bind anions has been exploited for sensing applications, in which anion coordination at antimony leads to a colorimetric response via a change in the geometry about the metal center. In addition, the capacity of antimony Lewis acids to modulate the electron density of coordinated metals has proved to be key in facilitating photochemical activation of M-X bonds as well as antimony-centered redox-controlled catalysis.
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Affiliation(s)
- J. Stuart Jones
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - François P. Gabbaï
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
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36
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Jamali S, Abedanzadeh S, Khaledi NK, Samouei H, Hendi Z, Zacchini S, Kia R, Shahsavari HR. A cooperative pathway for water activation using a bimetallic Pt0–CuI system. Dalton Trans 2016; 45:17644-17651. [DOI: 10.1039/c6dt03305a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cooperative activation of a water molecule with a bimetallic platinum(0)–copper(i) system results in formation of copper(i) hydroxide and a platinum hydride species. The latter is stable under acidic and neutral conditions but undergoes cyclometalation in the presence of pyridine.
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Affiliation(s)
- S. Jamali
- Chemistry Department
- Sharif University of Technology
- Tehran
- Iran
| | - S. Abedanzadeh
- Chemistry Department
- Sharif University of Technology
- Tehran
- Iran
| | - N. K. Khaledi
- Chemistry Department
- Sharif University of Technology
- Tehran
- Iran
| | - H. Samouei
- Department of Chemistry
- Texas A&M University
- College Station
- USA
| | - Z. Hendi
- Chemistry Department
- Sharif University of Technology
- Tehran
- Iran
| | - S. Zacchini
- Dipartimento di Chimica Industriale “Toso Montanari”
- Università di Bologna
- 4-40136 Bologna
- Italy
| | - R. Kia
- Chemistry Department
- Sharif University of Technology
- Tehran
- Iran
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37
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Mokhtarzadeh CC, Rheingold AL, Figueroa JS. Dinitrogen binding, P4-activation and aza-Büchner ring expansions mediated by an isocyano analogue of the CpCo(CO) fragment. Dalton Trans 2016; 45:14561-9. [DOI: 10.1039/c6dt02789j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Synthetic studies targeting an m-terphenyl isocyanide analogue of the unstable 16e−, S = 1 complex CpCo(CO) are reported (Cp = η5-C5H5).
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Affiliation(s)
| | - Arnold L. Rheingold
- Department of Chemistry and Biochemistry
- University of California
- San Diego
- La Jolla
- USA
| | - Joshua S. Figueroa
- Department of Chemistry and Biochemistry
- University of California
- San Diego
- La Jolla
- USA
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